I've just got my 2.6Ghz 15" Penryn MBP. The left fan is constantly on, making a wooshing sound that although not deafening, is considerably louder than that of my old G4 1.25Ghz 15" Alu. However, more worrying, is that the fan doesn't shut down when I put the laptop to sleep. It keeps going for around 20-30sec. During this period the computer is unresponsive and can't be woken up. The screen is blank. This happens every single time I put the computer to sleep (even if it is cold). Is anyone else experiencing the same problems? Should I contact Apple about this?